<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <center>
        <h1>百度</h1>
        <input type="text" size="40">
        <input type="button" value="百度一下" onclick="alert('百度不了')"><br>
        <a href="/reg.html">注册</a>
        <a href="/classtable.html">课程表</a>
    </center>
</body>
</html>